OPcache Clear - Deployment Pipeline

Foreword

The PHP process of the web server differs from the PHP process of the CLI environment. In view of this, it is not possible to clear the PHP OPcache via CLI.

Clear Script Deployment

The following PHP script must be provided in the document root directory of the Shopware 6 application:

Example path:

/var/www/creoline-demo.com/releases/current/public/opcache.php

opcache.php

<?php

$allowList = [
    '127.0.0.1',
    '10.20.0.1',
    '10.20.0.2',
    '10.20.0.3',
    '10.20.0.4',
];

header('Content-Type: text/plain');

if(!in_array($_SERVER['REMOTE_ADDR'], $allowList)) {
    http_response_code(403);
    echo "The ip {$_SERVER['REMOTE_ADDR']} is not allowed to execute this script.\n";
    return;
}

$status = opcache_get_status(false);

if(!$status['opcache_enabled']) {
    http_response_code(400);
    echo "OPcache is not enabled.\n";
    return;
}

$memoryUsed = round($status['memory_usage']['used_memory'] / 1024 / 1024);
$memoryFree = round($status['memory_usage']['free_memory'] / 1024 / 1024);

if(opcache_reset()) {
    http_response_code(200);
    echo "OpCache has been cleared successfully. Used memory: {$memoryUsed} MiB - Free memory: {$memoryFree} MiB\n";
} else {
    http_response_code(400);
    echo "OpCache could not be cleared.\n";
}

Deployment Integration

In the last step, after the symlink flip, the script must be called by each app server as follows:

curl -k --fail-with-body --retry 3 --retry-all-errors http://127.0.0.1/opcache.php -H "Host: www.creoline-demo.com"

Error handling

Success

• cURL Exitcode: 0
• The OPcache was successfully cleared

Error

• cURL Exitcode: 22
• The OPcache could not be emptied even after 3 attempts. Error analysis see HTTP-Body.